Chison Q9 - Cube Method; Teichholz Method; Lv;Rv

Q9 Digital Color Doppler Ultrasound System
86
[mL]
volume>>
ESV
End
-
systolic left ventricular volume
[mL]
Refer to << Calculation formula for
volume>>
SV
Stroke volume [mL]
SV=EDV
–
ESV
CO
Cardiac output
[L/min]
CO=SV x HR /1000
EF
Ejection fraction [no unit]
EF=SV/ EDV
5. Cube Method
This method calculates the left ventricular volume by approximating the given region to a cube.
Calculation formula for volume
EDV =LVIDd
3
ESV =LVIDs
3
<< Items to be measured>>
Meas. item name
Description
Meas. method
Diastole
End
-
diastolic left ventricular
measurements
Refer to “Measurement position”
IVSTd
lnterventricular septal thickness at
end diastole
Refer to "Distance Measurement
(Distance)".
LVIDd
Left ventricular short
-
axis
diameter at end diastole
Refer to "Distance Measurement
(Distance)".
LVPWd
Left ventricular posterior wall
thickness at end diastole
Refer to "Distance Measurement
(Distance)".
IVSTs
lnterventricular septal
thickness at
end systole
Refer to "Distance Measurement
(Distance)".
LVIDs
Left ventricular short
-
axis
diameter at end systole
Refer to "Distance Measurement
(Distance)".
LVPWs
Left ventricular posterior wall
thickness at end systole
Refer t
o "Distance Measurement
(Distance)".
<<Items to be calculated>>
Calc. item name
Description [Unit]
Calc. formula
EDV
End
-
diastolic left ventricular volume
[mL]
Refer to << Calculation formula for
volume>>
ESV
End
-
systolic left ventricular vol
ume
[mL]
Refer to << Calculation formula for
volume>>
SV
Stroke volume [mL]
SV=EDV
–
ESV
CO
Cardiac output [L/min]
CO=SV x HR /1000
FS
Fractional shortening
FS=(LVIDd
-
LVIDs)LVIDd
6. Teichholz Method
Calculation formula for volume
EDV =(7*LVIDd
3
) / (2.4+LVIDd)
ESV =(7*LVIDs
3
) / (2.4+LVIDs)
The items to be measured, the measurement procedures, and the items to be
calculated are identical to those in subsection ”CUBE method”.
7. LV/RV